7863785856 has 160 divisors (see below), whose sum is σ = 23556434880. Its totient is φ = 2604026880.

The previous prime is 7863785851. The next prime is 7863785869. The reversal of 7863785856 is 6585873687.

It is a junction number, because it is equal to n+sod(n) for n = 7863785793 and 7863785802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7863785851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1625361 + ... + 1630191.

It is an arithmetic number, because the mean of its divisors is an integer number (147227718).

Almost surely, 2^7863785856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7863785856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11778217440).

7863785856 is an abundant number, since it is smaller than the sum of its proper divisors (15692649024).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7863785856 is a wasteful number, since it uses less digits than its factorization.

7863785856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5014 (or 4993 counting only the distinct ones).

The product of its digits is 67737600, while the sum is 63.

The square root of 7863785856 is about 88677.9896930462. The cubic root of 7863785856 is about 1988.5837802868.

The spelling of 7863785856 in words is "seven billion, eight hundred sixty-three million, seven hundred eighty-five thousand, eight hundred fifty-six".